Halfords oil at £12 again

MarkJ · World Chat Champion Joined: 11 Apr 2006 Karma :

I popped in to my local Halfords today and they had the usual selection of 4L engine oil for £12. From looking at the website it seems to be 10W40 semi-synthetic, and 5W40 & 5W30 fully synthetic.

Cadbury · Crazy Courier Joined: 05 Oct 2011 Karma :

I'm sure it's been done to death, but is there a real difference in car vs bike oil? On the halfords site the motorcycle specific oil is at full price...

pompousporcup... · World Chat Champion Joined: 15 Apr 2015 Karma :

DrDonnyBrago · World Chat Champion Joined: 03 Jan 2010 Karma :

cheeseman · Trackday Trickster Joined: 11 Jun 2014 Karma :

weasley · World Chat Champion Joined: 16 Oct 2010 Karma :

johnsmith222 · World Chat Champion Joined: 26 Dec 2008 Karma :

I have a 9R which has been ridden hard, and it has only ever gotten cheapo 10w40 semi-synth car oil. No clutch slipping.

Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

Was full price in Halfords today Sad

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MarkJ · World Chat Champion Joined: 11 Apr 2006 Karma :

The 10W40 still seems to be £12 on their website, could try click & collect?

Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

It lets me order and takes my details but the final click to buy just does not work Sad

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Cyclingbiker · Spanner Monkey Joined: 05 Aug 2012 Karma :

Castrol GTX 4l 10w40 for £13 in Asda Thumbs Up

https://groceries.asda.com/product/oils-lubricants/castrol-gtx-10w40-a3b4/910000334646
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raak · Spanner Monkey Joined: 20 Dec 2006 Karma :

Ed Case · World Chat Champion Joined: 01 Mar 2009 Karma :

I use Wilkinsons semi-synth 10w/40 at £15 for 5 litres......dead happy with it.

DrDonnyBrago · World Chat Champion Joined: 03 Jan 2010 Karma :

STONEY! · Brolly Dolly Joined: 14 Sep 2005 Karma :

Cheap car oil is fine in most bikes, the posh synthetic stuff with friction inhibitors is what will kill your clutch, there's a code or something to look out for on the bottle but I can't for the life of me remember what it is! I just steer clear of the posh oil.

MarkJ · World Chat Champion Joined: 11 Apr 2006 Karma :

On again

MCN · Super Spammer Joined: 22 Jul 2015 Karma :

Tierbirdy · Crazy Courier Joined: 25 Jun 2014 Karma :

Did we ever reach a conclusion as to whether its going to make your gearbox explode and kill kittens or not? Who bought it last time? Did you die? Mr. Green

Googling these two and their respective information codes brings up the following:

Halfords 10W40 Part Synthetic Oil 4L Extra Info

API SL CF
ACEA A3 B3

Halfords Motorcycle Engine Oil Part Synthetic 10W/40 Extra Info

ACEA A3
API SL

Now the API SL/CF bit apparently is something to do with petrol/diesel engines, S is for spark (petrol) and C is compression (doozel)

source taken from ere!

ACEA Im not so sure about, its something to do with European car manufacturers? A3/B3 rating is something to do with high performance engines? So the Halfords own stuff doesnt look like its too shabby if it meets A3

says so ere!

But still no mention of the dreaded gearbox kitten murdering "friction modifiers" on either one?

So going purely from those two bits of info, the only difference between Halfords car/bike oil, is that bike oil wont work in a diesel engine?

Its all getting a bit too technical for me

M.C · Super Spammer Joined: 29 Sep 2015 Karma :

Snod Blatter · Crazy Courier Joined: 21 Nov 2014 Karma :

Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

Snod Blatter · Crazy Courier Joined: 21 Nov 2014 Karma :

Diesel oil is the way forward, higher levels of ZDDP are allowed and they have higher levels of "detegents" to clear away carbon deposits (supposedly). Also, as said, ZDDP appears to be most useful during the run-in period, afterwards you likely don't need so much which is why I'll still use the SL stuff in my K100.

Top hit for Mobil 1 Red Cap 15w50 talks about how Mobil have lowered the zinc content and tried to replace it with Teflon. And how it's now not so good. Hmm.

EDIT: Shell Rotella appears to be increasingly popular too, people seem to know it works well in bike engines. It's still a mystery as to why though, what are friction modifiers and why is this Rotella stuff not as slippery as others?? Also the wiki on Rotella even states it's popular with motorcyclists as it doesn't have any "friction modifiers" and has high levels of ZDDP. Sounds lovely. It's not available here though, too good.
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Northern Monkey · World Chat Champion Joined: 17 Nov 2013 Karma :

spottedtango · Trackday Trickster Joined: 04 Dec 2015 Karma :

I honestly don't buy into car and motorcycle oils. Provided it meets the API /ACEA requirements. I've been running all my bikes on car oils for the past 8 years. Not one problem with having a wet clutch, pick the right grade of oil (avoid the fancy or ultra high mileage stuff) and remember to change it.

I think some of the people that are into oil debates are the same ones that spend about 4 hours discussing the differences of Tesco momentum and shell v power. I think I remember the conclusion of one fuel debate coming down to normal supermarket fuel being for peasants lol Rolling Eyes

Rogerborg · nimbA Joined: 26 Oct 2010 Karma :